I'm in a bit of bind here at the moment. I've had this head for about three or four years now... Actively using it in a band situations for that entire time. A few months back, the volume would cut, still could hear it, but very quiet and muffled. I e-mailed the guys at Ashdown and they told me to flip the fuse on *I think* left hand front side. It worked, no volume cuts, lasted a few shows and for rehearsal today it crapped again. We have a show tomorrow night and I need to find out what kind of fuse it would take... The back panel says 120V 15A. I'm completely clueless about this stuff and wondering if replacing it will help. I would prefer to get it working right as all of my tone and effects are dialed in perfectly. The guitarist has kindly offer use of his Ampeg BR100 but I want to avoid using it if at all possible. Not enough time to get out there, test, EQ, pack and play a show with. I'm sure it's a good amp... but I'm not too terribley partial to reinventing the wheel when it's been a smooth ride thus far. Thoughts? Thanks... Much appreciated.